package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;

import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;


@Slf4j
@RestController
@RequestMapping("/dish")
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private CategoryService categoryService;
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private RedisTemplate redisTemplate;
    /**
     * 新增菜品
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);
        //清理所有菜品的缓存数据
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);

        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);
        return R.success("新增菜品成功");
    }
    /**
     * 菜品信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
        log.info("page = {},pageSize = {},name = {}",page,pageSize,name);

        Page<Dish> pageInfo = new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper();
        queryWrapper.like(StringUtils.isNotEmpty(name),Dish::getName,name);
        queryWrapper.orderByDesc(Dish::getUpdateTime);
        dishService.page(pageInfo,queryWrapper);
        //对象拷贝,除了records属性
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");

        List<Dish> records = pageInfo.getRecords();

        List<DishDto> list = records.stream().map((item)->{
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            //分类id
            Long categoryId = item.getCategoryId();
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if(category!=null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);
        return R.success(dishDtoPage);
    }
    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Dish> get(@PathVariable Long id){
        log.info("id = {}",id);
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }
    /**
     * 修改菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);
        //清理所有菜品的缓存数据
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);

        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);
        return R.success("修改菜品成功");
    }
    /**
     * 删除菜品
     * @param ids
     * @return
     */
    @DeleteMapping
    public R<String> delete(@RequestParam List<Long> ids){
        dishService.deleteWithFlavor(ids);
        return R.success("删除菜品成功");
    }
    /**
     * 状态更新：停售
     * @param ids
     * @return
     */
    @PostMapping("/status/0")
    public R<String> updateStatus0(@RequestParam List<Long> ids){
        List<Dish> dishes = dishService.listByIds(ids);
        dishes = dishes.stream().map((item)->{
            item.setStatus(0);
            return item;
        }).collect(Collectors.toList());
        dishService.updateBatchById(dishes);
        return R.success("状态更新成功");
    }
    /**
     * 状态更新：启售
     * @param ids
     * @return
     */
    @PostMapping("/status/1")
    public R<String> updateStatus1(@RequestParam List<Long> ids){
        List<Dish> dishes = dishService.listByIds(ids);
        dishes = dishes.stream().map((item)->{
            item.setStatus(1);
            return item;
        }).collect(Collectors.toList());
        dishService.updateBatchById(dishes);
        return R.success("状态更新成功");
    }
    /**
     * 根据种类Id获取菜品列表
     * @param dish
     * @return
     */
//    @GetMapping("/list")
//    public R<List<Dish>> list(Dish dish){
//        log.info("categoryId = {}",dish.getCategoryId());
//        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
//        queryWrapper.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
//        //添加条件，查询状态为1（起售状态）的菜品
//        queryWrapper.eq(Dish::getStatus,1);
//        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
//        List<Dish> list = dishService.list(queryWrapper);
//        return R.success(list);
//    }
    /**
     * 根据种类Id获取菜品列表,同时查询口味数据
     * @param dish
     * @return
     */
    @GetMapping("/list")
    @Transactional
    public R<List<DishDto>> list(Dish dish){
        List<DishDto> dishDtos = null;
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();//dish_1397844263642378242_1
        //先从reids中获取缓存数据
        dishDtos = (List<DishDto>) redisTemplate.opsForValue().get(key);
        if(dishDtos != null){
            //如果存在，直接返回，无需查询数据库
            return R.success(dishDtos);
        }
        log.info("categoryId = {},status = {}",dish.getCategoryId(),dish.getStatus());
        log.info(dish.toString());
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
        queryWrapper.eq(Dish::getStatus,1);
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(queryWrapper);
        LambdaQueryWrapper<DishFlavor> flavorqueryWrapper = new LambdaQueryWrapper<>();
        dishDtos = list.stream().map((item)->{
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            flavorqueryWrapper.eq(DishFlavor::getDishId,item.getId());
            List<DishFlavor> flavors = dishFlavorService.list(flavorqueryWrapper);
            dishDto.setFlavors(flavors);
            return dishDto;
        }).collect(Collectors.toList());
        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key,dishDtos,60, TimeUnit.MINUTES);
        return R.success(dishDtos);
    }
}
